Ball rack



FIG. 1 is a top, front, and left side perspective view of a ball rack showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a top, front, and left side perspective view thereof, the broken-line depiction of a number of balls being for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a ball rack, as shown and described. 